﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using L = Science.Mathematics.LinearAlgebra;

namespace Strang3Ed.Chapter02.Section6
{
    public class Example02
    {
        public Example02()
        {
        }
        private string result;
        public string Result
        {
            get { return result; }
        }
        public void Compute()
        {
            double[,] x = {{1.0,1.0,0.0,0.0},                           
                           {1.0,2.0,1.0,0.0},
                           {0.0,1.0,2.0,1.0},
                           {0.0,0.0,1.0,2.0}};

            L.Matrix A = new L.Matrix(x);

            L.FactorizationPAeqLU obj = new L.FactorizationPAeqLU(A);
            obj.Compute();

            L.Matrix L = obj.LowerTriangular;

            result += L.ToString();

            L.Matrix U = obj.UpperTriangular;

            result += U.ToString();

            L.Matrix P = L * U;

            result += P.ToString();
        }
    }
}
/*
1     0     0     0     
1     1     0     0     
0     1     1     0     
0     0     1     1     

1     1     0     0     
0     1     1     0     
0     0     1     1     
0     0     0     1     

1     1     0     0     
1     2     1     0     
0     1     2     1     
0     0     1     2     
*/
